At dawn/dusk I do the same, parking lights. It's the same in the rear as headlights on. I have considered changing all those lights to LED (front corners and taillights). Most people are approaching me from behind anyway.
At night if I'm in the middle of a group at a stoplight, I will shut the headlights off as well. It's kinder to the people in front of me as well as saving a little battery.